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First i do not understand why you do install 7.3.2 which is at least 5? years old. It should not be a problem to use the same version as your NW server.
If in doubt, please refer to the "Software Compatibility Guide".

One mandatory requirement is that the client must support remote procedure calls. It looks as if this is not available for whatever reason.

Despite the other standards like unique name resolution, you should test the connection from the server with this command: